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Credit: Getty Images

DANVILLE, KY - OCTOBER 10: Producers look at a television screen while testing lighting on stage the day before the vice presidential debate at Centre College October 10, 2012 in Danville, Kentucky. Republican vice presidential nominee Rep. Paul Ryan (R-WI) and Vice President Joe Biden will participate in the one and only vice presidential debate of the election tomorrow. (Photo by Chip Somodevilla/Getty Images)